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You can use absolute or relative Cartesian (rectangular) coordinates to locate points when creating objects.

To
use Cartesian coordinates to specify a point, enter an *X* value
and a *Y* value separated by a comma *(X,Y)*.
The *X* value is the positive or negative
distance, in units, along the horizontal axis. The *Y *value
is the positive or negative distance, in units, along the vertical
axis.

Absolute coordinates are based on the UCS origin
(0,0), which is the intersection of the *X *and *Y* axes.
Use absolute coordinates when you know the precise *X* and *Y* values
of the point.

With dynamic input, you
can specify absolute coordinates with the *#* prefix. If
you enter coordinates on the command line instead of in the tooltip,
the *#* prefix is not used. For example,
entering *#3,4* specifies a point 3 units
along the *X* axis and 4 units along the *Y* axis
from the UCS origin. For more information about dynamic input, see Use Dynamic Input.

The following example draws a line beginning
at an *X* value of -2, a *Y* value
of 1, and an endpoint at 3,4. Enter the following in the tooltip:

Command: *line*

From point: *#-2,1*

To point: *#3,4*

The line is located as follows:

Relative coordinates are based on the last point entered. Use relative coordinates when you know the location of a point in relation to the previous point.

To specify relative coordinates,
precede the coordinate values with an @ sign. For example, entering *@3,4* specifies a
point 3 units along the *X* axis and 4 units along the *Y* axis
from the last point specified.

The following example draws the sides of a triangle.
The first side is a line starting at the absolute coordinates -2,1
and ending at a point 5 units in the *X* direction
and 0 units in the *Y* direction. The second side is
a line starting at the endpoint of the first line and ending at
a point 0 units in the *X* direction and 3 units in the *Y* direction.
The final line segment uses relative coordinates to return to the
starting point.

Command: *line*

From point: *#-2,1*

To point: *@5,0*

To point: *@0,3*

To point: *@-5,-3*